smart indented HERE docs

[Derek Schrock]

I believe this would be a feature request however if this already
exists directly in bash please let me know.

With <<- you can indent a here-doc such that all tabs will be removed.
This can be nice for style reasons in your script however to give the
impression of formatting in the here-doc spaces can be added:

        ....
        cat <<- EOF
        Testing 1 2 3
        Testing 4 5 6
         Testing 7 8 9
        EOF
        ...

Keep in mind the above is prefixed with tabs so with <<- all the prefixed
tabs are removed.

Would result with:
Testing 1 2 3
Testing 4 5 7
 Testing 7 8 9

Would it be possible to add a new character (+) to the here-doc such
that the number of tabs remove are the number after the closing
delimiter (EOF in the above example):

        ....
        cat <<+ EOF
                Testing 0 9 8
                Testing 7 6 5
                Testing 4 3 2
        EOF

Note the above here-doc is tabbed out by two but the closing delimiter
is only tabbed by 1 so only 1 tab is removed.

Would result with:

        Testing 0 9 8
        Testing 7 6 5
        Testing 4 3 2

This would allow you to write here-docs inside functions and continue to
use tabs to maintain proper formatting and not have to use spaces.